Shuttle



C. S. WRIGHT.

SHUTTLE.

APPLlcAlpN FILED Dec. 18, 1920.

Patented oet 25, 1921'.

I of Massachusetts,

UNITED STATES PATENT OFFICE.

SHUTTLE.

Specification of Letters Patent.

Patented Oct. 25, 1921.

Application led December 18, 1920. Serial No. 431,734.'

To all whom t may concern.:

Be it known that I, CHARLES S. VRIGHT, a citizen of the United States,residing at West Stoughton, county of Norfolk, State have invented anTmprovement in Shuttles, of which the following description, inconnection with the ac-- companying drawing, is a specification, likecharacters on the drawing representing like arts. p This inventionrelates to shuttles of that type used in automatic weft-replenishinglooms wherein the replenishment of weft is effected by discharging thespent bobbin from the shuttle and substituting a fresh bobbin therefor.The invention has particular reference to the holding spring employed inthe shuttle for holding the bobbin in the shuttle. In this type of loomthe change of the bobbin in the shuttle is effected by means of aso-called transferrer which operates upon vexhaustion of the weft todrive a filled bobbin out of a hopperinto thel shuttle, and by this actto engage the spent bobbin in the shuttle and force the latter downthrough the open bottom of the shuttle. The bobbins are held in place inthe shuttle by means of rings on the heels of the bobbins which engagenotches formed in the holding spring, and in order to insure that thebobbin is properly placed in the shuttle, it is necessary for thetransferrer to follow the bobbin in its transferring movement to a pointwhere the .bobbin is correctly held by the'spring jaws. This involvesthe movement of the transferrer somewhat into the bobbin-receiving spacein the shuttle. Furthermore, in order that the transferrer may have thisextent of 'movement, it is necessary thatthe shuttle should be properlypositioned during the transferring operation for if the shuttle is latein its entry into the shuttle box, there is danger that the transferrerwill strike the shuttle and injure the latter. @ne of the objects of myinvention is to provide an improved bobbin-holding spring which not onlyfunctions to hold the bobbin properly positioned after it has beentransferred to the shuttle, but which also acts to complete thetransferring movement of the incoming bobbin, thus relieving thetransferrer of some work. lVith my improved spring it is suicient if thetransferrer carries the bobbin down to a point where it is enteredbetween the jaws of the spring, for after the bobbin has once beenentered the spring acts to complete the movement of the bobbin and carryit home.

ence with my invention it is not necessary to give the transferrer asgreat an extent of movement as has heretofore been thought necessary.This allows me to have the movement of the transferrer occur at a laterperiod than would otherwise be necessary, and thus a bobbin can betransferred into a' late shuttle without danger of injury.

Furthermore, less power is required to operate the transferrer where myinvention is employed than is the case where the transferrer has to makethe full extent of movement above referred to.

Other advantages are derived from using my invention which will be morefully hereinafter set forth.

In order to give an understanding of my invention, I have illustrated inthe drawings a selected embodiment thereof which will now be described,after which the novel features will be pointed out inv the appendedclaims.

Figure l is a plan view of a portion of a shuttle having a shuttlespring embodying my invention; Y

Fig. 2 is a section on the line 2-2, Fig. l, showing the bobbin inposition;

Fig. 3 is a section also on the line 2 2, Fig. l, showing the operationof placing a fresh bobbin in the shuttle equipped with my invention;

Fig. 4 is a view of one of the jaws of the spring;

Fig. 5 is a section on the line 6-6, Fig. 1.

In the drawings, l indicates a portion of a shuttle body having theusual bobbin-receiving slot or opening-2. formed therein, and 3indicates a bobbin in the shuttle-which is formed with the butt or heelend 5 that is received in the holding Spring, said heel of the ybobbinhaving the usual metal rings 4 encircling the same.

My improved bobbin-holding spring is of the usual forked type, it havingthe two resilient arms 6 between which the heel of the bobbin isreceived, said arms having notches 7 formed therein to receive the rings4 on the bobbin.

In order to obtain a better understanding of the invention, it may behelpful at this time to refer to the action of the ordinary holdingspring when a Ybobbin is being transferred into the shuttle. This isillustrated in Fig. 5 wherein the arms ofthe holding` spring areindicated at 8. 9 indicates the transferrer which is constructed to movedownwardly toward the shuttle during the change of bobbin and whichoperates to take a bobbin from the hopper and carry it into the shuttleand force the heel of the bobbin between the arms 8 of the holdingspring. The entrance of the filled bobbin into the Shuttle will ejectthe spent bobbin. In order to insure that the lled bobbin is properlypositioned in the spring it has heretofore been necessary to give thetransferrer a movement suiiicient to place the lilled bobbin completelyin the bobbinholding spring. If the movement of the transferrer stopsshort of this movement with the bobbin only partly entered between thearms of the spring, there is danger that the bobbin will snap out of thespring when the transferrer retreats. The carrying of the transferrerclear into the shuttle, re-

.v quires that the shuttle should be properly lpositioned during thetransferring operation, for ifl when a change of bobbins is to takeplace the shuttle is Slow in being boxed, or is what is commonly termeda late shuttle, the transferrer will carry the filled bobbin against.the end of the shuttle instead of into the bobbin-receiving space 1nthe shuttle thereby causing more or less damage.

As stated above, my improved bobbinholding spring is constructed so thatitv has apositive action on thebobbin in forcing thelatter home, so thatthe transferrer may be relieved of that much work.4

The arms V6 of my bobbin-holding spring are made ofincreased width, asshown in Figs. 2, 3 and 1, so that there is av considerable spacebetween the Anotch-es 7 and the top of each arm. The upperk portion ofthe inner face of each arm is curved inwardly slightly, as shown at 10,and the upper edge of each arm is beveled, as shown at 11. This forms aridge or shoulder 12 on the inner face'of each'arm adjacent the upperedge.

Each arm is also extended below the notches 7, as shown at 13, and theextended portion 13 isl curved inwardly slightly, as best seen in Figs.2 and 3. The vertical dimensions 0f each arm 6 at thenotched portionthereof is such that when a fresh bobbin is being' placed in the shuttlethe spent bobbin will notbe carried outV frombetw'een the arms 6 untilthe center of the incoming bobbin has been car,- ried below the ridgesor shoulders 12, as seen in Fig. 3. After the incoming bobbin hasreached the position shown in Fig. 3 and the ridges or shoulders 12 aresituated above the horizontal diameter, the resiliency of the springwill have the effect of forcing the incoming bobbin down intoV theposition shown in Fig. 2. This is because the pressure of the springsagainst the rings 4 due to the resiliency of the springs forces theridges or shoulders 12: against the rings above the center of thebobbin. 1With my invention, therefore, it is sufficient if thetransferrer 9 carries the incoming bobbin to the point shown in Fig. 3,andthen leaves it, for after the shoulders 12 have been carried abovethe horizontal diameter of the bobbin, then the spring will act toprevent the bobbin from jumping out from the shuttle and will serve toforce the bobbin downwardly into its proper position. It will thus beobvious that with my invention the transferrer may have a considerableless eX- tent of movement than with other bobbinholding springs as nowcommonly used without danger that the bobbin will fail to be carriedhome. An advantage which results from this construction is that it ispossible to delay the action of the transferrer somewhat, for since itdoes not have to make a movement of so great an extent as heretofore, itis possible to have the transferrer commence its movement a littlelater. This will accommodate any late shuttle and will yet. insure thatthe transfer of the bobbin is properly effected. Another advantage whichis inherent in this construction is that the movement of the transferrerin transferring a bobbin from the hopper to the shut-AV tle does nottend to draw the bobbin against the side of the shuttle because of the'fact that the downward or transferring motion ofthe transferrerterminates at about the position shownY in Fig. 3.v This transferrer vhas an oscillating movement about a center and at the time it reachesthe point shown in Fig. 3, the face of the transferrer which is againstthe bobbin is about on the horizontal line of the center. Any motion ofthe transferrerbelow this horizontal line would carry the face slightlytoward the shuttle due to the arc-,shaped path in which the face 110moves, but because the transferrer terminates its motion on vthehorizontal line of the center orV motion there is no tendency to swing.thebobbin inwardly toward the side of the shuttle. j

It will be noted that in my invention the upper edges of the widenedportions of the arms 6 aresituated just below thetop face of the shuttleso that as soon as the bobbin has entered the shuttle to the extentshown120 in Fig. 3 said bobbin is in position to be forced home by theresiliency of the springY arms. It will also be noted that the distancebetween the upper andlower edges of the widened portion of the springarms is at 125 least as great as Vthe diameter of theheel of the bobbin.Y .a

15 indicates the usual ,guide member which is employed to assist inguiding the bobbin into the jaws of the bobbin-holding spring. 13(

In my invention I ymake this guide with the curved portion 16 instead ofwith a straight angular portion as is usually done, I find that withsuch a curved portion the bobbin is guided into position with an easiermovement.

I claim:

l. A shuttle having a bobbin-receiving recess and a forkedbobbin-holding spring, the arms of the spring having relatively wide.ends, the upper edges whereof are only slightly below the top of t-heshuttle, said arms being provided with notches to receive the rings onthe bobbin heel and being curved inwardly from the notches to the upperedges, each arm having a beveled top edge which forms with the inwardcurvature ar ridge or shoulder closely adjacent the top edge of the armwhereby when a bobbin has been carried into a shuttle sufficiently sothat the horizontal diameter of the heel is below the shoulder or ridge,the resiliency of the spring arms together with the curvature thereofwill force the bobbin heel into the notches.

2. A shuttle having a bobbin-receiving recess and a forkedbobbin-holding spring, the upper edges of the arms of the spring beingonly slightly below the top of the shuttle, each arm of the forkedspring having a relatively wide end provided with notches to receive therings on the bobbin heel, the portions of each arm above and below thenotches being curved inwardly and each arm having on its inner faceadjacent its top edge a ridge or shoulder which is located from thebottom edge of said wide end a distance at least as great as thediameter of the heel of the bobbin, whereby a bobbin being introducedinto the shuttle will have its horizontal diameter carried below theridges before the spent bobbin has been ejected from the shuttle.

In testimony whereof I name to this specification.

CHARLES S. WRIGHT.

have signed my

